A high-precision powder molding machine

Abstract

The utility model relates to powder forming machine technical field, and disclose a kind of high-precision powder forming machine, including powder forming machine body and the processing platform inside powder forming machine body, the fixed frame is fixedly connected on the processing platform upper surface, the fixed frame both sides are slidably connected with slide, the fixed connection of one end between two the slide closer to powder forming machine body is sent powder box, annular material groove is set in the middle position of the powder box, the top position of annular material groove is equipped with conical groove, and conical groove is communicated with annular material groove;The utility model is equipped with conical groove on powder box, can receive powder from powder pipe, and it is smoothly guided to annular material groove, this process effectively disperses powder, reduces the phenomenon of uneven accumulation, so that the powder distribution of final filling into mould groove is more uniform, and the consistency of bulkiness is consistent, beneficial to the uniformity of product density after compression molding.

Description

Technical Field

[0001] This utility model relates to the field of powder forming machine technology, and more specifically to a high-precision powder forming machine. Background Technology

[0002] Powder forming technology is an indispensable near-net-shape forming process in modern manufacturing. It is widely used in the production of precision parts such as powder metallurgy, ceramics, and cemented carbide. The core of this technology is to fill metal or non-metal powder into the mold cavity of a specific mold, and then apply high pressure to densify it to form a blank of a predetermined shape and size.

[0003] Currently, in the entire powder forming process chain, powder filling, as the first step, directly determines the precision, density uniformity, and performance consistency of the final pressed product. If the powder filling amount in the mold cavity is uneven or there is a positional deviation, it will lead to product defects. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a high-precision powder molding machine to solve the problem that in the entire powder molding process chain, powder filling, as the first step, directly determines the precision, density uniformity and performance consistency of the final pressed product. If the powder filling amount in the mold cavity is uneven or there is a positional deviation, it will lead to product defects.

[0005] This utility model provides the following technical solution: a high-precision powder forming machine, including a powder forming machine body and a processing table inside the powder forming machine body. A fixed frame is fixedly connected to the upper surface of the processing table, and slides are slidably connected to both sides of the fixed frame. A powder feeding box is fixedly connected between the two slides near the end of the powder forming machine body. An annular material groove penetrating vertically is opened in the middle of the powder feeding box, and a conical groove is opened at the top of the annular material groove, which communicates with the annular material groove. The shape of the annular material groove matches the shape of the mold groove on the processing table. A cylinder is fixedly connected to one side of the fixed frame, and the piston end of the cylinder passes through the fixed frame and is fixed to one side of the powder feeding box through a U-shaped mounting seat. A scraping component for cleaning the surface of the processing table is provided on the outer wall of the powder feeding box near the powder forming machine body. The bottom of the powder feeding box is in close contact with the upper surface of the processing table. A powder feeding pipe is provided on the upper surface of the powder feeding box, and the powder feeding pipe is connected to an external powder supply device, with the bottom end of the powder feeding pipe completely covering the conical groove.

[0006] As a further embodiment of this utility model, the powder feeding box is a hollow shell structure, and at least three sets of vibration motors are provided on the inner wall of the powder feeding box at a position corresponding to the annular material trough, and the three sets of vibration motors are distributed in a circumferential array around the center line of the annular material trough.

[0007] As a further embodiment of this utility model, the scraping assembly includes multiple fixing rings fixedly connected to the outer wall of one side of the powder feeding box, and a round rod slidably connected inside each of the multiple fixing rings. A scraper frame is fixedly connected to the bottom end of each of the multiple round rods, and two scrapers are detachably connected to the lower surface of the scraper frame by bolts.

[0008] As a further embodiment of this utility model, the bottom ends of the two scrapers are bent in opposite directions to form an "eight" shaped structure, and the bottom ends of the scrapers are in contact with the surface of the processing table.

[0009] As a further embodiment of this utility model, springs are sleeved on the outer sides of the plurality of round rods, and the two ends of the springs are respectively fixed to the lower surface of the fixing ring and the upper surface of the scraper frame.

[0010] As a further embodiment of this utility model, a feeding hopper is fixedly connected to one side of the processing table, and the feeding hopper is provided with multiple powder filtering holes.

[0011] As a further embodiment of this invention, the side of the hopper furthest from the processing table is tilted downwards.

[0012] As a further embodiment of this utility model, the filter pores are tapered pores with a gradually expanding diameter from the inside to the outside.

[0013] The technical effects and advantages of this utility model are as follows: 1. This utility model has a conical groove on the powder feeding box, which can receive powder from the powder feeding tube and smoothly guide it into the annular material groove. This process effectively disperses the powder and reduces uneven accumulation, so that the powder finally filled into the mold groove is more evenly distributed and has a consistent fluffiness, which is beneficial to the uniformity of the density of the product after pressing and molding.

[0014] 2. This utility model, through its elastic scraping component, enables the scraper to closely adhere to the surface of the processing table under the continuous pressure of the spring, and can adapt to minor unevenness of the plane. When the powder feeding box moves, it can scrape away the excess powder overflowing from the mold groove and the residue on the table, ensuring the cleanliness of the processing table before each pressing. This completely avoids residual powder affecting the flatness of the bottom surface of the next pressing or damaging the mold, and significantly improves the product qualification rate.

[0015] 3. This utility model integrates precise powder feeding and cleaning functions into a single mechanism, which is compact, operates smoothly, and requires no manual intervention, greatly shortening the auxiliary time in a single molding cycle, thereby significantly improving the overall production efficiency of the powder molding machine. Attached Figure Description

[0016] Figure 1 This is a front perspective view of the present invention.

[0017] Figure 2 For the present utility model Figure 1 Rear 3D view.

[0018] Figure 3 This is a structural diagram of the processing table of the powder molding machine body of this utility model.

[0019] Figure 4 This is a cross-sectional view of the powder delivery box of this utility model.

[0020] Figure 5 This is a structural diagram of the scraping component of this utility model.

[0021] The attached figures are labeled as follows: 1. Powder forming machine body; 2. Fixed frame; 3. Slide frame; 4. Powder feeding box; 5. Scraper assembly; 6. Powder feeding pipe; 7. Cylinder; 8. Conical groove; 9. Annular material trough; 10. Vibration motor; 11. Fixed ring; 12. Round rod; 13. Scraper frame; 14. Scraper; 15. Spring; 16. Discharge hopper; 17. Powder filter hole. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Reference Figures 1-5 This utility model provides a high-precision powder forming machine, including a powder forming machine body 1 and a processing table inside the powder forming machine body 1. A fixing frame 2 is fixedly connected to the upper surface of the processing table by bolts. Sliders 3 are slidably connected to both sides of the fixing frame 2. A powder feeding box 4 is fixedly connected to one end of the two sliders 3 near the powder forming machine body 1 by bolts. An annular material trough 9 is formed in the middle of the powder feeding box 4, and a conical groove 8 is formed at the top of the annular material trough 9, and the conical groove 8 communicates with the annular material trough 9. The shape of the material trough 9 matches the shape of the mold groove on the processing table. A cylinder 7 is fixedly connected to one side of the fixing frame 2 by bolts. The piston end of the cylinder 7 passes through the fixing frame 2 and is fixed to one side of the powder feeding box 4 through the U-shaped mounting seat. The outer wall of the powder feeding box 4 near the powder forming machine body 1 is provided with a scraping component 5 for cleaning the surface of the processing table. The bottom of the powder feeding box 4 is in close contact with the upper surface of the processing table. The upper surface of the powder feeding box 4 is provided with a powder feeding pipe 6. The powder feeding pipe 6 is connected to the external powder supply equipment, and the bottom end of the powder feeding pipe 6 completely covers the conical groove 8.

[0024] It should be noted that the powder forming machine body 1 includes a frame, a mold (upper punch and lower mold groove), and a hydraulic cylinder. After the powder is fed, the upper punch is pressed down into the mold groove and the pressure is maintained for a period of time to allow the powder particles to fully plastically deform and interlock, thereby pressing the powder into a blank. This is existing technology and will not be elaborated on here.

[0025] It should be noted that: Cylinder 7 is a power actuator that converts the pressure energy of compressed air into mechanical energy. By controlling the gas in and out, it drives the piston to perform linear reciprocating motion. It can be used in conjunction with a magnetic switch, proximity switch or photoelectric switch to achieve precise control of the extension and retraction displacement of the piston rod of cylinder 7. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0026] After the pressing cycle is completed, the powder feeding box 4 is usually located in the initial position on one side of the upper surface of the processing table. When feeding powder into the mold groove, the cylinder 7 is activated, the piston rod of the cylinder 7 extends, and pushes the entire powder feeding box 4 to slide smoothly on the fixed frame 2 through the slide 3 until the annular material groove 9 at the bottom of the powder feeding box 4 is precisely aligned and covers the mold groove of the processing table. The external powder supply equipment conveys powder downward through the powder feeding pipe 6. The powder enters the conical groove 8 at its bottom through the powder feeding pipe 6. The conical groove 8 guides the powder so that the powder can fall more evenly into the annular material groove 9 connected to it.

[0027] The powder feeding box 4 is equipped with a conical groove 8, which can receive the powder from the powder feeding pipe 6 and guide it smoothly into the annular material groove 9. This process effectively disperses the powder and reduces uneven accumulation, so that the powder finally filled into the mold groove is more evenly distributed and has a consistent fluffiness, which is beneficial to the uniformity of the density of the product after pressing and molding.

[0028] Furthermore, the powder feeding box 4 is a hollow shell structure. At least three sets of vibration motors 10 are provided on the inner wall of the powder feeding box 4 at the position corresponding to the annular material trough 9, and the three sets of vibration motors 10 are distributed in a circumferential array around the center line of the annular material trough 9.

[0029] It should be noted that the vibration motor 10 is existing technology, model number: HY30DC12V-G. It is converted into controllable, multi-parameter mechanical vibration through an eccentric mass block, realizing digital and flexible control of vibration intensity, frequency and even mode, thereby meeting the needs of high-precision and diversified industrial applications. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0030] Combined with the high-frequency micro-amplitude vibration of the vibration motor 10 (it should be noted that since the powder feeding box 4 is a hollow shell structure, the vibration motor 10 is installed inside the powder feeding box 4. Therefore, when the vibration motor 10 works, it can induce mechanical resonance in the powder feeding box 4), the "bridging" phenomenon during powder feeding is effectively broken, making the powder more compactly arranged in the annular material groove 9, which greatly improves the uniformity and density of the powder filled into the mold groove.

[0031] During the powder feeding process, the vibration motor 10 is started, and the high-frequency micro-amplitude vibration generated by it is effectively transmitted to the entire powder feeding box 4 and the powder inside, preventing the formation of an "arch bridge" at the outlet of the conical groove 8 or the annular material groove 9 and thus preventing blockage, ensuring that the powder falls smoothly.

[0032] To ensure that the surface of the processing table is always clean, in this utility model, the scraping assembly 5 includes multiple fixing rings 11 that are fixedly connected to the outer wall of one side of the powder feeding box 4 by bolts. Each fixing ring 11 has a round rod 12 that is slidably connected inside it. The bottom end of the multiple round rods 12 is fixedly connected to a scraper frame 13 by bolts. The lower surface of the scraper frame 13 is detachably connected to two scrapers 14 by bolts.

[0033] Furthermore, the bottom ends of the two scrapers 14 are bent in opposite directions to form an "eight" shape, and the bottom ends of the scrapers 14 are in contact with the surface of the processing table.

[0034] When the mold cavity is filled with powder, the piston rod of cylinder 7 retracts, pulling the powder feeding box 4 back to the initial position. During the movement of the powder feeding box 4, the scraping assembly 5 fixed to its side moves synchronously.

[0035] Furthermore, springs 15 are fitted on the outer sides of multiple round rods 12, and the two ends of the springs 15 are fixed to the lower surface of the fixing ring 11 and the upper surface of the scraper frame 13, respectively.

[0036] Under the continuous pressure of the spring 15, the scraper 14 can fit tightly against the surface of the processing table and can adapt to minor unevenness of the plane. When the powder feeding box 4 moves, it can scrape away the excess powder overflowing from the mold groove and the residue on the table, ensuring the cleanliness of the processing table before each pressing. This completely avoids residual powder affecting the flatness of the bottom surface of the next pressing or damaging the mold, and significantly improves the product qualification rate.

[0037] Integrating precise powder feeding and cleaning functions into a single mechanism, the compact structure and smooth operation require no manual intervention, greatly shortening the auxiliary time within a single molding cycle and thus significantly improving the overall production efficiency of the powder molding machine.

[0038] Under the continuous pressure of the spring 15, the scraper 14 always stays in close contact with the surface of the processing table. The spring 15 provides a downward force to the scraper frame 13 through the round rod 12, which ensures the stability of the contact between the scraper 14 and the table surface and can adapt to small flatness errors. The bottom ends of the two scrapers 14 are bent in opposite directions to form an "eight" shaped structure. When the powder feeding box 4 moves, the scraper 14 can effectively scrape away the excess powder that overflows from the mold groove and is scattered on the processing table.

[0039] When the powder feeding box 4 returns to its initial position, the scraping action is completed, the processing table is clean and new, and the mold cavity is filled with a fixed amount of precise powder. At this time, the upper and lower punches of the powder forming machine body 1 can start the pressing work, while the powder feeding and cleaning unit remains in standby mode, waiting for the current pressing cycle to end before starting the next powder feeding cycle.

[0040] In this utility model, a feeding hopper 16 is fixedly connected to one side of the processing table by bolts, and a plurality of powder filter holes 17 are provided on the feeding hopper 16.

[0041] Furthermore, the side of the hopper 16 away from the processing table is inclined downwards, and the filter hole 17 is a tapered hole with a gradually expanding diameter from the inside to the outside.

[0042] When a workpiece is finished and sent to the processing table surface, the next powder feeding process will push the formed workpiece towards the unloading hopper 16. The aggregation of multiple formed workpieces will push the workpiece in front, causing it to fall onto the unloading hopper 16 and be sent out.

[0043] The use of this utility model involves the following steps: S1: After the pressing cycle is completed, the powder feeding box 4 is usually located in the initial position on one side of the upper surface of the processing table. When feeding powder into the mold cavity, the cylinder 7 is activated. The piston rod of the cylinder 7 extends and pushes the entire powder feeding box 4 to slide smoothly on the fixed frame 2 through the slide 3 until the annular material groove 9 at the bottom of the powder feeding box 4 is precisely aligned and covers the mold cavity of the processing table. The external powder supply equipment conveys powder downward through the powder feeding pipe 6. The powder enters the conical groove 8 at its bottom through the powder feeding pipe 6. The conical groove 8 guides the powder so that the powder can fall more evenly into the annular material groove 9 connected to it. During this process, the vibration motor 10 is started. The high-frequency micro-amplitude vibration generated by it is effectively transmitted to the entire powder feeding box 4 and the powder inside, preventing the formation of an "arch bridge" at the outlet of the conical groove 8 or the annular material groove 9 and blockage, ensuring that the powder falls smoothly. S2: When the mold cavity is filled with powder, the piston rod of cylinder 7 retracts, pulling the powder feeding box 4 back to the initial position. During the movement of the powder feeding box 4, the scraping assembly 5 fixed to its side moves synchronously. Under the continuous pressure of spring 15, the scraper 14 always sticks to the surface of the processing table. Spring 15 provides downward force to scraper frame 13 through round rod 12, ensuring the stability of the contact between scraper 14 and the table surface, and can adapt to small flatness errors. The bottom ends of the two scrapers 14 are bent in opposite directions to form an "eight" shaped structure. When the powder feeding box 4 moves, the scraper 14 can effectively scrape away the excess powder that overflows from the mold cavity and is scattered on the processing table. S3: When a workpiece is finished and sent to the surface of the processing table, the next powder feeding process will push the formed workpiece toward the unloading hopper 16. The aggregation of multiple formed workpieces will push the workpiece in front, causing it to fall onto the unloading hopper 16 and be sent out.

[0044] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change. The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs. The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. A high-precision powder forming machine, comprising a powder forming machine body (1) and a processing table inside the powder forming machine body (1), characterized in that: A fixed frame (2) is fixedly connected to the upper surface of the processing table. Slide carriages (3) are slidably connected to both sides of the fixed frame (2). A powder feeding box (4) is fixedly connected between the ends of the two slide carriages (3) near the powder forming machine body (1). An annular material groove (9) penetrating vertically is provided in the middle of the powder feeding box (4). A conical groove (8) is provided at the top of the annular material groove (9), and the conical groove (8) communicates with the annular material groove (9). The shape of the annular material groove (9) matches the shape of the mold groove on the processing table. The fixed frame (2)... A cylinder (7) is fixedly connected to one side. The piston end of the cylinder (7) passes through the fixing frame (2) and is fixed to one side of the powder feeding box (4) through the U-shaped mounting seat. The powder feeding box (4) has a scraping component (5) for cleaning the surface of the processing table on the outer wall of the side near the powder forming machine body (1). The bottom of the powder feeding box (4) is in close contact with the upper surface of the processing table. The upper surface of the powder feeding box (4) is provided with a powder feeding pipe (6). The powder feeding pipe (6) is connected to the external powder supply equipment, and the bottom end of the powder feeding pipe (6) completely covers the conical groove (8).

2. The high-precision powder forming machine according to claim 1, characterized in that: The powder feeding box (4) is a hollow shell structure. At least three sets of vibration motors (10) are provided on the inner wall of the powder feeding box (4) at a position corresponding to the annular material trough (9), and the three sets of vibration motors (10) are arranged in a circumferential array around the center line of the annular material trough (9).

3. The high-precision powder forming machine according to claim 1, characterized in that: The scraping assembly (5) includes multiple fixing rings (11) fixedly connected to the outer wall of one side of the powder feeding box (4). Each of the multiple fixing rings (11) is slidably connected to a round rod (12). The bottom end of the multiple round rods (12) is fixedly connected to a scraper frame (13). The lower surface of the scraper frame (13) is detachably connected to two scrapers (14) by bolts.

4. A high-precision powder forming machine according to claim 3, characterized in that: The bottom ends of the two scrapers (14) are bent in opposite directions to form an "eight" shape, and the bottom ends of the scrapers (14) are in contact with the surface of the processing table.

5. A high-precision powder forming machine according to claim 3, characterized in that: A spring (15) is fitted on the outer side of each of the multiple round rods (12), and the two ends of the spring (15) are fixed to the lower surface of the fixing ring (11) and the upper surface of the scraper frame (13), respectively.

6. A high-precision powder forming machine according to claim 1, characterized in that: A feeding hopper (16) is fixedly connected to one side of the processing table, and a plurality of powder filter holes (17) are provided on the feeding hopper (16).

7. A high-precision powder forming machine according to claim 6, characterized in that: The hopper (16) is tilted downward on the side away from the processing table.

8. A high-precision powder forming machine according to claim 6, characterized in that: The filter powder pore (17) is a tapered pore with a gradually expanding diameter from the inside to the outside.

Images